Developing an Embedded system with ARM & Inferno operating system is a radically simplified revolutionary approach. ARM offers the widest choice of embedded operating systems (OS) and execution environments for embedded system development. Inferno comes with all that is needed to quickly develop advanced applications and with ideal solution to produce a winning system design. Inferno is a compact and powerful operating system, ideal for use in embedded devices. It runs on most popular processor architectures. Nowadays Personal Digital Assistants are no more a luxury but a necessity. We will make an attempt to build the essential PDA applications in Inferno environment ported on ARM processor. © 2012 IEEE.